Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2016

Commitments and Contingencies Disclosure [Abstract]

Schedule of future minimum lease payments under noncancelable operating leases

As of December 31, 2016, future minimum lease payments under noncancelable operating leases were as follows (in thousands):

Year
2017	$	20,749
2018	17,422
2019	15,603
2020	14,365
2021	9,770
Thereafter	231,888
	$	309,797

Schedule of future commitments to pay for usage of port facilities, marine consumables, services and maintenance contracts

At December 31, 2016, we have future commitments to pay for our usage of certain port facilities, marine consumables, services and maintenance contracts as follows (in thousands):

Year
2017	$	232,055
2018	162,434
2019	129,920
2020	103,013
2021	57,506
Thereafter	110,319
	$	795,247